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Titolo:
MEASUREMENT OF GAMMA(Z(0)-]B(B)OVER-BAR)GAMMA(Z(0)-]HADRONS) USING IMPACT PARAMETERS AND LEPTONS
Autore:
AKERS R; ALEXANDER G; ALLISON J; ANDERSON KJ; ARCELLI S; ASTBURY A; AXEN D; AZUELOS G; BAINES JTM; BALL AH; BANKS J; BARLOW RJ; BARNETT S; BARTOLDUS R; BATLEY JR; BEAUDOIN G; BECK A; BECK GA; BECKER J; BEESTON C; BEHNKE T; BELL KW; BELLA G; BENTKOWSKI P; BERLICH P; BETHKE S; BIEBEL O; BLOODWORTH IJ; BOCK P; BODEN B; BOSCH HM; BOUTEMEUR M; BREUKER H; BRIGHTTHOMAS P; BROWN RM; BUIJS A; BURCKHART HJ; BURGARD C; CAPILUPPI P; CARNEGIE RK; CARTER AA; CARTER JR; CHANG CY; CHARLTON DG; CHU SL; CLARKE PEL; CLAYTON JC; COHEN I; CONBOY JE; COOPER M; COUPLAND M; CUFFIANI M; DADO S; DALLAVALLE GM; DEJONG SJ; DELPOZO LA; DENG H; DIECKMANN A; DITTMAR M; DIXIT MS; SILVA EDE; DUBOSCQ JE; DUCHOVNI E; DUCKECK G; DUERDOTH IP; DUMAS DJP; ELCOMBE PA; ESTABROOKS PG; ETZION E; EVANS HG; FABBRI F; FABBRO B; FIERRO M; FINCKEKEELER M; FISCHER HM; FONG DG; FOUCHER M; GAIDOT A; GARY JW; GASCON J; GEDDES NI; GEICHGIMBEL C; GENSLER SW; GENTIT FX; GIACOMELLI G; GIACOMELLI R; GIBSON V; GIBSON WR; GILLIES JD; GOLDBERG J; GINGRICH DM; GOODRICK MJ; GORN W; GRANDI C; GRANT FC; HAGEMANN J; HANSON GG; HANSROUL M; HARGROVE CK; HARRISON PF; HART J; HATTERSLEY PM; HAUSCHILD M; HAWKES CM; HEFLIN E; HEMINGWAY RJ; HERTEN G; HEUER RD; HILL JC; HILLIER SJ; HILSE T; HINSHAW DA; HOBBS JD; HOBSON PR; HOCHMAN D; HOMER RJ; HONMA AK; HUGHESJONES RE; HUMBERT R; IGOKEMENES P; IHSSEN H; IMRIE DC; JANISSEN AC; JAWAHERY A; JEFFREYS PW; JEREMIE H; JIMACK M; JONES M; JONES RWL; JOVANOVIC P; JUI C; KARLEN D; KAWAGOE K; KAWAMOTO T; KEELER RK; KELLOGG RG; KENNEDY BW; KING J; KLUTH S; KOBAYASHI T; KOETKE DS; KOKOTT TP; KOMAMIYA S; KRAL JF; KOWALEWSKI R; VONKROGH J; KROLL J; KYBERD P; LAFFERTY GD; LAFOUX H; LAHMANN R; LAUBER J; LAYTER JG; LEBLANC P; LEE AM; LEFEBVRE E; LEHTO MH; LELLOUCH D; LEROY C; LETTS J; LEVINSON L; LLOYD SL; LOEBINGER FK; LORAH JM; LORAZO B; LOSTY MJ; LOU XC; LUDWIG J; LUIG A; MANNELLI M; MARCELLINI S; MARKUS C; MARTIN AJ; MARTIN JP; MASHIMO T; MATTIG P; MAUR U; MCKENNA J; MCMAHON TJ; MCNUTT JR; MEIJERS F; MENSZNER D; MERRITT FS; MES H; MICHELINI A; MIDDLETON RP; MIKENBERG G; MILDENBERGER J; MILLER DJ; MIR R; MOHR W; MOISAN C; MONTANARI A; MORI T; MORII M; MULLER U; NELLEN B; NGUYEN HH; ONEALE SW; OAKHAM FG; ODORICI F; OGREN HO; ORAM CJ; OREGLIA MJ; ORITO S; PANSART JP; PANZERSTEINDEL B; PASCHIEVICI P; PATRICK GN; PAZJAOSHVILI N; PEARCE MJ; PFISTER P; PILCHER JE; PINFOLD J; PITMAN D; PLANE DE; POFFENBERGER P; POLI B; PRITCHARD TW; PRZYSIEZNIAK H; QUAST G; REDMOND MW; REES DL; RICHARDS GE; RISON M; ROBINS SA; ROBINSON D; ROLLNIK A; RONEY JM; ROS E; ROSSBERG S; ROSSI AM; ROSVICK M; ROUTENBURG P; RUNGE K; RUNOLFSSON O; RUST DR; SASAKI M; SBARRA C; SCHAILE AD; SCHAILE O; SCHAPPERT W; SCHARF F; SCHARFFHANSEN P; SCHENK P; SCHMITT B; VONDERSCHMITT H; SCHRODER M; SCHWICK C; SCHWIENING J; SCOTT WG; SETTLES M; SHEARS TG; SHEN BC; SHEPHERDTHEMISTOCLEOUS CH; SHERWOOD P; SIROLI GP; SKILLMAN A; SKUJA A; SMITH AM; SMITH TJ; SNOW GA; SOBIE R; SPRINGER RW; SPROSTON M; STAHL A; STEGMANN C; STEPHENS K; STEUERER J; STROHMER R; STROM D; TAKEDA H; TAKESHITA T; TAREM S; TECCHIO M; TEIXEIRADIAS P; TESCH N; THOMSON MA; TORRENTELUJAN E; TOWERS S; TRANSTROMER G; TESILIAN NJ; TSUKAMOTO T; TURNER MF; VANDENPLAS D; VANKOOTEN R; VANDALEN GJ; VASSEUR G; WAGNER A; WAGNER DL; WAHL C; WARD CP; WARD DR; WATKINS PM; WATSON AT; WATSON NK; WEBER M; WEBER P; WELLS PS; WERMES N; WHALLEY MA; WILKENS B; WILSON GW; WILSON JA; WINTERER VH; WLODEK T; WOLF G; WOTTON S; WYATT TR; YAARI R; YEAMAN A; YEKUTIELI G; YURKO M; ZEUNER W; ZORN GT;
Indirizzi:
UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM B15 2TT W MIDLANDS ENGLAND UNIV BOLOGNA,DIPARTIMENTO FIS I-40126 BOLOGNA ITALY INFN I-40126 BOLOGNA ITALY UNIV BONN,INST PHYS W-5300 BONN 1 GERMANY UNIV CALIF RIVERSIDE,DEPT PHYS RIVERSIDE CA 92521 UNIV CAMBRIDGE,CAVENDISH LAB CAMBRIDGE CB3 0HE ENGLAND CARLETON UNIV,DEPT PHYS OTTAWA K1S 5B6 ONTARIO CANADA CARLETON UNIV,CTR RES PARTICLE PHYS OTTAWA K1S 5B6 ONTARIO CANADA CERN,EUROPEAN ORG PARTICLE PHYS CH-1211 GENEVA 23 SWITZERLAND UNIV CHICAGO,ENRICO FERMI INST CHICAGO IL 60637 UNIV CHICAGO,DEPT PHYS CHICAGO IL 60637 ALBERT LUDWIGS UNIV,FAK PHYS D-79104 FREIBURG GERMANY UNIV HEIDELBERG,INST PHYS D-69117 HEIDELBERG GERMANY INDIANA UNIV,DEPT PHYS BLOOMINGTON IN 47405 UNIV LONDON,QUEEN MARY & WESTFIELD COLL LONDON E1 4NS ENGLAND UNIV LONDON BIRKBECK COLL LONDON WC1E 7HV ENGLAND UNIV LONDON UNIV COLL LONDON WC1E 6BT ENGLAND UNIV MANCHESTER,SCHUSTER LAB,DEPT PHYS MANCHESTER M13 9PL LANCS ENGLAND UNIV MARYLAND,DEPT PHYS COLL PK MD 20742 UNIV MONTREAL,PHYS NUCL LAB MONTREAL H3C 3J7 QUEBEC CANADA UNIV OREGON,DEPT PHYS EUGENE OR 97403 RUTHERFORD APPLETON LAB DIDCOT OX11 0QX OXON ENGLAND DAPNIA,SPP SACLAY F-91191 GIF SUR YVETTE FRANCE TECHNION ISRAEL INST TECHNOL,DEPT PHYS IL-32000 HAIFA ISRAEL TEL AVIV UNIV,DEPT PHYS & ASTRON IL-69978 TEL AVIV ISRAEL UNIV TOKYO,INT CTR ELEMENTARY PARTICLE PHYS TOKYO 113 JAPAN UNIV TOKYO,DEPT PHYS TOKYO 113 JAPAN KOBE UNIV KOBE 657 JAPAN BRUNEL UNIV UXBRIDGE UB8 3PH MIDDX ENGLAND WEIZMANN INST SCI,DEPT NUCL PHYS IL-76100 REHOVOT ISRAEL UNIV HAMBURG,DESY,INST EXPTL PHYS 2 D-22607 HAMBURG GERMANY UNIV VICTORIA,DEPT PHYS VICTORIA V8W 3P6 BC CANADA UNIV BRITISH COLUMBIA,DEPT PHYS VANCOUVER V6T 1Z1 BC CANADA UNIV ALBERTA,DEPT PHYS EDMONTON T6G 2N5 AB CANADA DUKE UNIV,DEPT PHYS DURHAM NC 27708
Titolo Testata:
Zeitschrift fur Physik. C, Particles and fields
fascicolo: 3, volume: 61, anno: 1994,
pagine: 357 - 369
SICI:
0170-9739(1994)61:3<357:MOGUI>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
HADRONIC Z0 DECAYS; HEAVY FLAVOR PRODUCTION; RADIATIVE-CORRECTIONS; E+E ANNIHILATION; Z-RESONANCE; B-QUARK; OPAL EXPERIMENT; STANDARD MODEL; LEP DATA; TOP;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
63
Recensione:
Indirizzi per estratti:
Citazione:
R. Akers et al., "MEASUREMENT OF GAMMA(Z(0)-]B(B)OVER-BAR)GAMMA(Z(0)-]HADRONS) USING IMPACT PARAMETERS AND LEPTONS", Zeitschrift fur Physik. C, Particles and fields, 61(3), 1994, pp. 357-369

Abstract

A measurement of GAMMA(bbBAR)/GAMMA(had) = GAMMA(Z0 --> bbBAR)/GAMMA(Z0 --> hadrons) is presented using a '' mixed tag '' method involving the identification of Z0 --> bbBAR events by two different techniques. The first uses the large impact parameter of tracks emerging from thedecay of b-flavoured hadrons and the second their semi-leptonic decay. The identification efficiencies are measured from the data using allpossible combinations of the two tags in opposite hemispheres. The method is therefore insensitive to Monte Carlo modelling of bottom quarkproduction and of b-flavoured hadron production and decay properties,and depends only weakly on the simulation of the detector. The data sample collected by OPAL at LEP in 1990 and 1991 is considered. The result is: GAMMA(bbBAR)/GAMMA(had) = 0.218 +/- 0.006 (stat) +/- 0.007 (syst) +/- 0.007 (GAMMA(ccBAR)/GAMMA(had)), where the systematic uncertainty due to the charm quark partial width has been separated from the other systematic uncertainties. Combination with previous OPAL measurements gives: GAMMA(bbBAR)/GAMMA(had) = 0.220 +/- 0.004 (stat) +/- 0.006(syst) +/- 0.006 (GAMMA(ccBAR)/GAMMA(had)).

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Documento generato il 27/11/20 alle ore 02:26:38